Refrigerator shelf



FIG. 1 is a front, left, top perspective view of the refrigerator shelf;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a rear, right, bottom perspective view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a left-side view threof; and,

FIG. 8 is a right-side view thereof. 

The ornamental design for a refrigerator shelf, as shown and described. 